Combined lock and latch.



PATENTED SEPT. 6, 1904.

' -w. L. FRAZER.

OOMBINED LOCK AND LATCH.

APPLICATION FILED AUG. 7, 1903.

N0 MODEL.

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UNITED STATES Patented September 6, I904.

PATENT OFFICE.

COMBINED LOCK AND LATCH.

SPECIFICATION forming part of Letters Patent No. 769,213, dated September 6, 1904'.

Application filed August '7, 1903.

To all whom it mag concern:

Be it known that I, WALTERL. FRAZER, a citizen of the United States, residing at National City, in the :county ofSan Diego and Stateof California,- have invented a new and useful Combined Lock and Latch, of which the'following is a specification. This invention relates to combined locks and latches, and has for its principal object to pro .vide a combined lock and latch associated with a tubular casing of any suitable configuration in which the combined lock-and-latch mechanism is rigidly held-when the combined lock and latch is in use, but from which the lockand-latch mechanism may be removed asan entirety when it is desirable to do so. A further objectof the invention is to pro' vide'a combined lock and latch of simple construction in which the number of parts are few and not easily broken, which maybe at all times reliable in its operation, and may be conveniently assembled and disassembled when desired. I

A further object of the invention is toprovide a combined lock and latch in which the same bolt acts as a'latchingbolt or alocking' bolt, according to circumstances, in which the bolt is released by means of a knob-actuated shaft, and in. which the bolt is normally held in operative position by a spring" and ,issusceptible of being positively secured in opera tive position by means of a locking dog.

With theobjects above stated and others in view, which will appear as the invention is i more fully described, the same consists in the novel construction and combination of parts of a combined lock and latch hereinafter fully described, illustrated in the accompanying drawings, and having the novel features thereof particularly pointed out in the appended claims. 1 s

In the drawings, Figure 1 is a vertical longitudinal. section through the lock, showing the dog depressed in locking position. 2 is a horizontal longitudinal section through the lock. Fig. 3 is atransverse section through the-lock in the plane of the openingin the tumblers. Fig. 4 is a transverse section through the actuating-shaftand the extension of one of the knobs, showing the mode of se- Fig.

swarm. 168,665. (No model.)

. curinga knobv in position on the shaft. Fig.

5 is a view lock.

Corresponding parts are designated by the of a key adapted for use with the same characters of reference throughout the several views. J 'Referring to the'drawings in detail, Idesignates generally the tubular casing for the combined lock and latch, which is made of thin metal of any suitable kind, as brass, and which may have any desired configuration, but which is here shown as round. The tubular casing is provided with a plurality of openings, certain of which will be specifically designated as, the invention is further described, and has formed on opposite sides, by bending inward small portions2 of the metal composing the casing, guide'ways to insure the proper position of the lock-and-latch mechanism when inserted into the casing in the manner presently tobe described. At the forward end of the tubular casing are provided screw-threads 3, by means of which the casing is attached to a door.

The lock-and-latch mechanism comprises a bolt (designated generally as 4) comprising a slotted plate 5, which forms the body of the bolt, and a head 6, the face of which is, formed with a bevelinthe ordinary fashion. :The bolt 4 is secured between a keyhole-plate 7 of rectangular outline and a guard-plate 8 of rectangular outline also, but of somewhatdifferent contour-from the keyhole-plate. The plates 7 and 8 are provided with keyholes and are of the same width as the plate 5, constituting the body portion of the bolt, and are rigidly connected'by means of'riv'ets 9, which extend through the large slot 10 in the plate 5 and hold the plates 7 and 8 in such relation to the plate 5 that they constitute a guideway therefor. The plates 7 and 8, with the plate 5 between them, form together a structure of just sufiicient width to move in the guideways formed by the inwardly-bent portions 2 of the metal'of the tubular casing 1, andwhen the .lock-and-latch mechanism is tobe placed in position in the casing the bolt secured between the keyhole-plate 7 and the guard-plate 8.will

be introduced at the open rear end of the easing and pushed forward in such position that IOO the plates 7 and 8 will lie in the guides formed by the lugs 2. The head 6 of the bolt will then project outward through a rectangular opening 3 in the casing end. and the parts of the lock-and-latch mechanism will lie in proper relation to the openings in the casing sides.

When the parts of the lock-and-latch mechanism have been properly positioned in the casing, they will be secured therein by the introduction of a slightly tapered pin 11 through the openings 12 in the casing and the registering openings 13 in the keyhole and guard plates. The pin 11 will then hold the guard and keyhole plates in rigid association with the tubular casing 1, and the bolt will be slidable to and fro between the keyhole and guard plates.

In order to hold the bolt normally in operative position, there is provided at the rear of the plate 5, which extends rearward beyond the keyhole-plate, a hook 14, to which is removably secured a spiral spring 15, the forward end of which is connected with a hook 16 at the forward end of the keyhole-plate.

The mechanism for positively holding the bolt in operative position when it is to be used as a locking-bolt comprises the locking-dog 17, provided at its rear end with an opening 18, which is adapted to register with the openings 13 in plates 7 and 8, so that the pin 11, which holds the plates 7 and 8 in rigid association with the tubular casing, may form the pivot upon which the locking-dog swings. The locking-clog is provided at its forward end with an extension or toe 19, which is adapted whendepressed to lie behind a shoulder 20, formed in the slot 10 in the plate 5, and so prevent a retraction of the bolt. To hold the dog 17 in operative or inoperative position, as desired, I provide a plurality of tumblers 21-in this instance three in numberwhich are pivotally supported adjacent to the plate 8, as shown, and which are provided at their lower ends with slots 22,from the sides of which project lugs 23, which are oppositely disposed, and leave between them a passage of just sutficient width for the movement therein of a stud 24:, which projects laterally from the dog 17 The tumblers 21 are provided at their upper ends with springs 25,which hold the tumblers normally in the position shown in Fig. 1, in which the stud 24 is shown in contact with the forward side of the slot 22 in each of the tumblers, and the lugs 23 in the several tumblers are so held that the passage between the lugs on one of the tumblers does not register with the passage between the lugs on the adjacent tumblers, and therefore any movement of the dog 17 on its pivot-pin is prevented.

When it is desired to shift the position of the dog 17 to throw it into operative or inoperative position, a key of the form shown at 26 must be introduced through the keyhole 27 in the plate 7 or the keyhole in the plate 8 and turned therein. When the dog 17 is in inoperative position and it is desired to throw it into operative position, the key will be turned in the direction indicated by the arrow in Fig. 1, and the lugs on the key will simultaneously engage the tumblers 21 and force them into such position that the projections in the slots 22 will register and leave a passage downward, through which the stud 2 1 may pass. As the lugs in the slots 22 are brought into registration the key will also engage a shoulder 28 on the dog 17 and force the dog downward into operative position.

hen it is desired to release the lockingdog from operative position, the key 26 will be turned in the opposite direction and the action will be reversed, the key engaging a shoulder 28 on the locking-dog to raise it when the lugs 23 are brought into registration.

The action of the key, as described in the two preceding paragraphs, is entirely without effect upon the position of the bolt 1,which is retracted by means of a knob 29 of the ordinary type used upon doors. The knob 29 is, however, rigidly associated with a sleeve, provided inside with an opening 30 of square cross-section,which is larger at the inner end than the outer, and into the opening 30 is litted the split end of a squared shaft 31, which is secured in the opening 30 by means of a pointed screw 32, which spreads the split end of the shaft 31, so that the sides thereof contact with the sides of the openings 30 and prevent the withdrawal of the shaft from said opening. A sleeve 33,having a bore of square cross-section, is carried by the shaft 31 and is provided intermediate of its ends with a flange 34:. The flange 3 1 is provided with an opening in which is held a link 35, which also passes through the slot 10 in the plate 5 of the bolt. When the bolt is in operative position, as shown in Fig. 1, the link 35 will rest against the inner end of the slot 10 and will lie substantially parallel with the side walls of the tubular casing, so that when the knob 29 is turned the link 35 will be retracted and the bolt 1 withdrawn from operative position.

It will be observed that the entire mechanism within the tubular casing 1 is securely eonnected,so that when it is desired to remove the lock-and-latch mechanism from the casing as an entirety it may be done by simply withdrawing the tapered pin 11 from the openings 12 in the casing and the openings 13 in the plates 7 and 8. A rearward pull upon the sleeve 33 will then cause the withdrawal of all the lock-and-latch mechanism from the interior of the casing.

The peculiar form of key shown in Fig. 5 is made necessary by reason of the placing of the tumblers 21 upon one side of the bolt 1 instead of arranging them within the space between the plates 7 and 8, which is entirely occupied by the locking-dog 17. \Vhen thekey is inserted into the look from the side on which the tumblers 21 are placed, the tumbler-engaging lug on the reduced portion of the key -will be thrust through the opening in the plate 8, and the lug upon the larger part of the key will be operative to shift the tumblers.

When the key is inserted from the opposite side of the look, a shoulder at the end of the larger partof the key will engagewith the inner face of the plate 8 and thetumbler-engaging lug upon the reduced portion of the key will be operative to shift the tumblers.

When the door is slammed, the beveled face of the head of the lockingbolt-will act as a cam to force the ,bolt rearward in the casing in the usual manner, and the link 35, which will be supported by contact with the hook 14, which projects from one side of the lockingbolt, as best seen in Fig. 2, will allow the bolt to move inthe casing without imparting rotary movement to the knob-shaft 31.

a keeper, which consists of a block of circular cross-section and of the same diameter as the lock-casing, which, as shown at 4:0, is provided on its exterior with screw-threads similar to the screw-threads 3 at the forward end of the lock-casing. The-screw-threads on the block 40 form a convenient means for securing the block in position in the door-frame by merely boring a circular opening therein of suitable diameter and screwing the-block into position. The block 40 is provided, of course, with a bolt-receiving opening 41 of the usual form and in positioning the block it is necessary that the opening 41 be brought into proper relation to the head of the l0cking-bolt.

While the lock is shown in the preferred position for operation, it will be obvious that when necessary the lock may be turned through an arc of one hundred and eighty degrees within the opening provided therefor in the door and the position of the beveled face of the head of the locking-boltexactly reversed, thereby changingv a right-hand block to a left-hand block, and vice versa. The positioning of the lock-and-latchmechanism within the tubular casing is exactly thereverse of the removal therefrom and is as easily accomplished;

The ease with which the lock-and-latch mechanism may be introduced into'the casing as an entirety or removed therefrom without disassembling is a feature of special advantage because it facilitates the construction and repair of the lock-and-latch mechanism to a great extent, saving much time in the assembling of the parts because all of the interior mechanism of the lock and latch may be properly connected before it is introduced into the casing, whereas if the members had to be introduced separately much less of time would result on account of the difliculty of properly connecting the parts after their introduction within the casing.

It will In connectionwith the lock as described in the foregoing paragraph'it is desirable to usehave been observed from-the fore-- easily made;

Having thus described the construction and operation of my invention, what-I claim as new, and desire to secure by Letters Patent,

1. The combination with a tubular casing having oppositely-disposed pairs of inwardlyturned latch mechanism adapted for insertion between said pairs of lugs and means for posilugs forming guides, of a lock-and tively securing said lock-and-latch mechanism in position in said casing.

2. The combination with a tubular casing of a keyhole-plate, a guard-plate rigidly con-v nected with said keyhole-plate and spaced therefrom to form guideways, a slotted bolt slidably mounted between-said plates, a pin extending through said casing and through said plates to hold them in rigid association, a lockingdog'pivotally mounted on said pin between said plates and within the slot in said bolt, means for holding said dog in operative or inoperative posltlon, a spring for keeping said bolt normally in operative position, and

means for retracting said bolt.

8. The-combination in a combined lock and latch, of a keyhole-plate and a guard-plate spaced apart and rigidly connected, a bolt slidably mounted between said plates'and extending to the rear thereof, a hook on one of I said plates at its forward'end, a hook on said Y bolt at its rear end, a tension-spring carried in operative position, and means for retracting sald bolt agalnst the action of said spring.

- by said'hooks and holding said bolt normally 4. The combination in a combined lock and and latch,.of a pair of plates spaced apart and forming a guide, a slotted bolt slidably disposed between said plates, a locking-dog IIO pivotally supported between the plates and within the slot in the bolt, said locking-dog having a lateral projection, a-plurality of tumblers adapted to engage with said projection to hold the locking-dog in operative or inoperative position, and a spring attached the bolt normally advanced.

5. The combination in a combined lock and latch, of a pair of plates both provided with to one of said plates and to said bolt to keep keyholes spaced apart to form a guide, a

slotted bolt slidably mounted-between said plates, a locking-dog pivotally supported between said plates and arranged in said'slot in the bolt, a lateral projection upon-said locking-dog extending through one of said plates, a plurality of tumblers supported on the outer side of one of said plates and adapted. to engage with said projection to hold the locking-dog in operative or inoperative-post tion, and a spring mounted on the outside of the other plate and connected With the bolt to keep it normally advanced.

6. The combination in a combined lock and latch, of a pair of plates both provided with keyholes and spaced apart to form a guide, one of said keyholes being larger than the other, a slotted bolt slidably mounted between said plates, a locking-dog pivotally supported between said plates Within the slot in the bolt, said locking-dog being slotted for the passage of a key introduced through either of said keyholes, a lateral projection on said locking-dog extending through one of said plates, a plurality of tumblers mounted on 5 

